Polymer matrices heat and light stablized with novel benzophenone/1,4-dihydropyridine compounds

Abstract

Polymer matrices, e.g., halogenated polymers such as PVC, polyolefins, polystyrenes, polyalkadiences, etc., are stabilized against the adverse effects of heat and light, by incorporating therein an effective stabilizing amount of a compound of the formula (I): <IMAGE> (I) <IMAGE> +TR <IMAGE> in which n is a number ranging from 1 to 3, and R is a methyl radical or a hydrogen atom.

What is claimed is: 
     
       1. A benzophenone/1,4-dihydropyridine compound having the formula (I): ##STR3## in which n is a number ranging from 1 to 3, and R is a methyl radical or a hydrogen atom. 
     
     
       2. A compound as defined by claim 1, the same being 3,5-bis[2-(4-benzoyl-3-hydroxyphenoxy)ethoxycarbonyl]-2,6-dimethyl-1,4-dihydropyridine. 
     
     
       3. A compound as defined by claim 1, the same being 3,5-bis[2-(4-benzoyl-3-hydroxyphenoxy)-2-methylethoxycarbonyl]-2,6-dimethyl-1,4-dihydropyridine.